001// ***************************************************************************************************************************
002// * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.  See the NOTICE file *
003// * distributed with this work for additional information regarding copyright ownership.  The ASF licenses this file        *
004// * to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance            *
005// * with the License.  You may obtain a copy of the License at                                                              *
006// *                                                                                                                         *
007// *  http://www.apache.org/licenses/LICENSE-2.0                                                                             *
008// *                                                                                                                         *
009// * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an  *
010// * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the License for the        *
011// * specific language governing permissions and limitations under the License.                                              *
012// ***************************************************************************************************************************
013package org.apache.juneau.rest.processor;
014
015import static org.apache.juneau.http.HttpHeaders.*;
016
017import java.io.*;
018
019import org.apache.juneau.rest.*;
020import org.apache.juneau.http.resource.*;
021
022/**
023 * Response handler for {@link HttpResource} objects.
024 *
025 * <h5 class='section'>See Also:</h5><ul>
026 *    <li class='link'><a class="doclink" href="../../../../../index.html#jrs.ResponseProcessors">Response Processors</a>
027 * </ul>
028 */
029public final class HttpResourceProcessor implements ResponseProcessor {
030
031   @Override /* ResponseProcessor */
032   public int process(RestOpSession opSession) throws IOException {
033
034      RestResponse res = opSession.getResponse();
035      HttpResource r = res.getContent(HttpResource.class);
036
037      if (r == null)
038         return NEXT;
039
040      res.setHeader(r.getContentType());
041      res.setHeader(r.getContentEncoding());
042      long contentLength = r.getContentLength();
043      if (contentLength >= 0)
044         res.setHeader(contentLength(contentLength));
045
046      r.getHeaders().forEach(x -> res.addHeader(x));
047
048      try (OutputStream os = res.getNegotiatedOutputStream()) {
049         r.writeTo(os);
050         os.flush();
051      }
052
053      return FINISHED;
054   }
055}
056